Core and casting.



PATENTED DEC. 31, 1907.

R. MILNE. GORE AND CASTING.

APPLICATION FILED JUNE 14. 1907.

Wifn asses 5mm 726m nrrsn s'rar ATENT OFFICE.

ROBERT MILNE, OF ROCKFORD, ILLINOIS, ASSIGNOR TO BARNES COMPANY, A CORPORATION OF ILLINOIS.

CORE AND CASTING.

Patented Dec. 3 1 1 907.

Application filed June 14. 1907. Serial No. 378,989.

To all whom itmay concern:

Be it known that I, ROBERT MILNE, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Cores and Castings, of which the following is a specification.

In the ordinary practice of drilling screw holes in castings for the accommodation of set screws or similar devices, it is customary to drill and thread a hole directly into the metal of the casting, which is often a difficult and laborious undertaking, either by reason of the location of the hole or the heavy and cumbersome character of the casting,

for which reasons drills are frequently broken and difficulty, expense and loss of time experienced in providing screw holes of this character.

The object of the present invention is to obviate the difliculties above noted, by. em-

bedding a nut in the body of the casting during the molding operation, which not only obviates the necessity for drilling the completed casting at frequently inaccessible points, butalso results in a better construe tion than could be otherwise obtained, in view of the superior quality of the metal ordinarily employed in makin nuts.

The present invention re ates, more particularly, to the peculiar formation of the core, which permits the nut to be embedded in the manner indicated; and also relates to the completed castin which is the necessary result of the emp oyment of the hereinafter described core.

The invention consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings, Figure 1 is a sectional plan view of the belt pulley, having a nut embedded in its hub for the reception of a set screw; Fi 2 a perspective view showing one of the ha ves of a core box; and Fig. 3 a sectional elevation of a mold and core, illustrating the method by which the nut is embedded. I V

In Fig. 1 is shown a belt wheel of the ordinary character, comprising a rim 4, and a hub 5 connected with the rim by means of spokes 6. The hub has formed thereon a boss 7, through which extends a hole 8, in-' screw threaded bore 10 of the nut is of reduced diameter as com ared with the diameter of the hole 8, an the nut, being em-. beddedintermediate the ends of the hole, a clearance is provided on the inner and outer sides of the nut, which gives the set screw, when inserted, a better grip on the shaft with which it is intended to cooperate.

It will be understoodthat the invention is not intended to be limited to a casting of any particularly style, and that the belt pulley ierein shown serves merely for the purpose of illustratin the manner in which the nut is formed an embedded. The flat faces of the nut prevent any turning or movement within its socket, and the overhanging inner and outer portions of the casting serve to hold the nut in substantially integral connection with the casting within which it isembedded.

A wheel, or a similar device of the general character above described, is cast with a core 1 1, the general configuration of which is of the usual style, comprising an enlarged body section 12, adapted to form the en larged inner chamber 13 of the completed casting and cylindrical end portions 14 of a diameter suitable to embrace the shaft or other structure uponwhich the casting is intended to be mounted. The core of the present invention, however, differs from the ordinary core, in that it is provided with a stud or post 15, outwardly extending from the body portion of the core, which stud or post extends through the nut 9, which is positioned and mounted u on the core stiid uring the operation of orming the core. The cylindrical end portions 14 of the core terminate in tapered end prints 16, and the stud 15 terminates in a stud print 17, which prints enable the core, as a whole, to be roperly ositioned and held in the sand mo (1 18, whic 1 is formed in the usual manner. The core stud is of uniform diameter, both inside and outside of the nut, but the necklike pertion, which extends through the nut and fills the threads thereof, is of somewhat re duced diameter, which gives a clearance in the completed casting, boi' inside and outside of the nut. As shown in Fig. 2, the opening 19 in the mold 18 is of suitable size and shape to thoroughly embed the nut in the hub of the casting, in the manner shown in Fig. 1. i

is formed in a core box 20, one-half of whichis shown in Fig. 2, which core box has,

through its center, a groove or channel 21 of the pro er configuration to form a core of the shape a ove described, and the channel has outwardl extending therefrom a stud channel 22, w 'ch is provided at a suitable point with a recess'23, of suitable size and shape to permit a nut to be drop ed thereinto and clamped .in place when t e companion section of the core box is inserted.

In making the core, a nut is laid in one of the sections of the core box, and thereafter the companion section of the box is clamped in place and the core box filled with the core composition, which is packed through the threaded hole in'the nut, so that the embedded nut becomes, in effect, an integral part of the core and occupies its proper place in the mold when the core is inserted. When the metal is poured into the mold, it fills in around the nut, without finding ingress into the threads thereof, so that after the core has been broken out of the completed castin the threads of the nut will be clean and rea y to receive the set screw or other screw member intendedto cooperate with the nut.

By the employment of a core box and core formed in the manner indicated, the difliculty'of making cores and castings is not appreciably increased, and the drilling o eration is entirely dispensedwith, and with it the difiiculties attendantfon the mani ulation of heavy and bulky castings, whic frequently require drilling at practically inaccompleted casting will ordinarily be im-.

proved, by reason of the fact that nuts are ordinarily formed of-a higher grade of metal than is employed in the making of-castings, so that the resulting structure will provide a bettersocket for the rece tion of a set-screw than could be rovided y the ordinary direct methods 0 forming the screw holes for.

set screws.

What I regard as new and desire to secure by Letters Patent is: I I g. 1. A core provided with a stud or post outwa'rdly projecting from the bod of the core, and a nut 'surroundin the stu or post and having the material t ereof passed through the threaded interior of the nut, substantially as described.

- 2. 'A core provided with a stud or post out .wardly extending from the body thereof, and a nut surrounding the stud or post at a suitable distance f rom the wall of the body, the stud or post extendin beyond the outer face of the nut for embedtfi faces of the nut Within the casting, substantiallyas described.

- ROBERT MILNE. Witnesses:

SAML. H. Rncx, MAUDE E. PALMITER.

ng the inner and outer 

